Patent US3473852A successfully refreshed from Google Patents.
US3473852A
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Magnetic suspension apparatus
Assignee: Cambridge Thermionic Corp
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Filing: 1967-12-18
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Granted: 1969-10-21
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Expires: 1987-12-18
Abstract
No abstract record available.
Inventors
- 👤 Joseph Lyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:09
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/04; F16C32/0406; F16C32/044; F16C32/0444; F16C32/0474; F16C32/0476
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733857A
Cited
US2797912A
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US2856238A
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US3215901A
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US3226016A
Cited
US3243238A
Cited
US3307884A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |